211869770768 has 40 divisors (see below), whose sum is σ = 411507620160. Its totient is φ = 105674440320.

The previous prime is 211869770767. The next prime is 211869770779. The reversal of 211869770768 is 867077968112.

It is a self number, because there is not a number n which added to its sum of digits gives 211869770768.

It is not an unprimeable number, because it can be changed into a prime (211869770767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28896863 + ... + 28904193.

It is an arithmetic number, because the mean of its divisors is an integer number (10287690504).

Almost surely, 2^211869770768 is an apocalyptic number.

It is an amenable number.

211869770768 is a deficient number, since it is larger than the sum of its proper divisors (199637849392).

211869770768 is a wasteful number, since it uses less digits than its factorization.

211869770768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11535 (or 11529 counting only the distinct ones).

The product of its (nonzero) digits is 14224896, while the sum is 62.

The spelling of 211869770768 in words is "two hundred eleven billion, eight hundred sixty-nine million, seven hundred seventy thousand, seven hundred sixty-eight".